57e696d01a3dc5407f24b3d297e3acf4ef921062
[urcu.git] / configure.ac
1 # -*- Autoconf -*-
2 # Process this file with autoconf to produce a configure script.
3
4
5 AC_INIT([userspace-rcu],[0.8.0],[mathieu dot desnoyers at efficios dot com])
6
7 # Following the numbering scheme proposed by libtool for the library version
8 # http://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
9 AC_SUBST([URCU_LIBRARY_VERSION], [3:0:0])
10
11 AC_CONFIG_AUX_DIR([config])
12 AC_CONFIG_MACRO_DIR([config])
13 AC_CANONICAL_TARGET
14 AC_CANONICAL_HOST
15 AM_INIT_AUTOMAKE([foreign dist-bzip2 no-dist-gzip])
16 AM_MAINTAINER_MODE([enable])
17 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
18
19 m4_include([config/ax_tls.m4])
20
21 AC_CONFIG_SRCDIR([urcu.h])
22
23 AC_CONFIG_HEADERS([config.h urcu/config.h])
24
25 AH_TEMPLATE([CONFIG_RCU_SMP], [Enable SMP support. With SMP support enabled, uniprocessors are also supported. With SMP support disabled, UP systems work fine, but the behavior of SMP systems is undefined.])
26 AH_TEMPLATE([CONFIG_RCU_HAVE_FENCE], [Defined when on a system that has memory fence instructions.])
27 AH_TEMPLATE([CONFIG_RCU_HAVE_FUTEX], [Defined when on a system with futex support.])
28 AH_TEMPLATE([CONFIG_RCU_COMPAT_ARCH], [Compatibility mode for i386 which lacks cmpxchg instruction.])
29 AH_TEMPLATE([CONFIG_RCU_ARM_HAVE_DMB], [Use the dmb instruction if available for use on ARM.])
30 AH_TEMPLATE([CONFIG_RCU_TLS], [TLS provided by the compiler.])
31
32 # Allow overriding storage used for TLS variables.
33 AC_ARG_ENABLE([compiler-tls],
34 AS_HELP_STRING([--disable-compiler-tls], [Use pthread_getspecific() to emulate Thread Local Storage (TLS) variables.]),
35 [def_compiler_tls=$enableval],
36 [def_compiler_tls="yes"])
37
38 # If not overridden, use ax_tls.m4 to check if TLS is available.
39 AS_IF([test "x$def_compiler_tls" = "xyes"],
40 [AX_TLS([def_tls_detect=$ac_cv_tls], [:])],
41 [:])
42
43 AS_IF([test "x$def_tls_detect" = "x"],
44 [:],
45 [AC_DEFINE_UNQUOTED([CONFIG_RCU_TLS], $def_tls_detect)])
46
47 # Checks for programs.
48 AC_PROG_CC
49 AC_PROG_MAKE_SET
50 LT_INIT
51
52 # Checks for typedefs, structures, and compiler characteristics.
53 AC_C_INLINE
54 AC_TYPE_PID_T
55 AC_TYPE_SIZE_T
56 AC_TYPE_INT32_T
57 AC_TYPE_UINT32_T
58 AC_TYPE_UINT64_T
59 AC_TYPE_UINT8_T
60
61 # Checks for library functions.
62 AC_FUNC_MALLOC
63 AC_FUNC_MMAP
64 AC_CHECK_FUNCS(
65 [bzero gettimeofday munmap sched_getcpu strtoul sysconf gettid memeset strerror]
66 )
67
68 # Check for headers
69 AC_CHECK_HEADERS([limits.h stddef.h sys/time.h])
70
71 # Find arch type
72 AS_CASE([$host_cpu],
73 [i386], [ARCHTYPE="x86" && SUBARCHTYPE="x86compat"],
74 [i486], [ARCHTYPE="x86"],
75 [i586], [ARCHTYPE="x86"],
76 [i686], [ARCHTYPE="x86"],
77 [amd64], [ARCHTYPE="x86"],
78 [x86_64], [ARCHTYPE="x86"],
79 [powerpc], [ARCHTYPE="ppc"],
80 [ppc64], [ARCHTYPE="ppc"],
81 [powerpc64], [ARCHTYPE="ppc"],
82 [powerpc64le], [ARCHTYPE="gcc"],
83 [ppc], [ARCHTYPE="ppc"],
84 [s390], [ARCHTYPE="s390"],
85 [s390x], [ARCHTYPE="s390"],
86 [sparc], [ARCHTYPE="sparc64"],
87 [sparc64], [ARCHTYPE="sparc64"],
88 [alpha*], [ARCHTYPE="alpha"],
89 [ia64], [ARCHTYPE="gcc"],
90 [arm*], [ARCHTYPE="arm"],
91 [aarch64], [ARCHTYPE="gcc"],
92 [mips*], [ARCHTYPE="mips"],
93 [tile*], [ARCHTYPE="gcc"],
94 [hppa*], [ARCHTYPE="hppa"],
95 [ARCHTYPE="unknown"]
96 )
97
98 AS_CASE([$host],[*-*-linux-androideabi],
99 [AM_CONDITIONAL(TARGET_IS_ANDROID, true)],
100 [AM_CONDITIONAL(TARGET_IS_ANDROID, false)]
101 )
102
103 AC_SUBST(ARCHTYPE)
104 AC_SUBST(SUBARCHTYPE)
105
106 UATOMICSRC=urcu/uatomic/$ARCHTYPE.h
107 ARCHSRC=urcu/arch/$ARCHTYPE.h
108
109 AS_IF([test "x$SUBARCHTYPE" = xx86compat],[
110 AC_DEFINE([CONFIG_RCU_COMPAT_ARCH], [1])
111 ])
112
113 AS_IF([test "$host_cpu" = "armv7l"],[
114 CFLAGS="$CFLAGS -mcpu=cortex-a9 -mtune=cortex-a9 -O1"
115 ])
116
117 # ARM-specific checks
118 AS_IF([test "x$ARCHTYPE" = "xarm"],[
119 AC_MSG_CHECKING([for dmb instruction])
120 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
121 int main()
122 {
123 asm volatile("dmb":::"memory");
124 return 0;
125 }
126 ]])
127 ],[
128 AC_MSG_RESULT([yes])
129 AC_DEFINE([CONFIG_RCU_ARM_HAVE_DMB], [1])
130 ],[
131 AC_MSG_RESULT([no])
132 ])
133 ])
134
135 # Tile-specific checks
136 AS_IF([echo "$host_cpu" | grep "^tile"],[
137 AC_MSG_CHECKING([for Tile architecture type])
138 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
139 #ifndef __tilegx__
140 #error
141 #endif
142 ]])
143 ],[
144 AC_MSG_RESULT([ok])
145 ],[
146 AC_MSG_FAILURE([URCU has only been tested on the TileGx architecture. For other Tile* architectures, please run the tests first and report the results to the maintainer so that proper support can be added.])
147 ])
148 ])
149
150 # x86-specific checks
151 AS_IF([test "x$ARCHTYPE" = "xx86"],[
152 AC_MSG_CHECKING([if architecture really supports the mfence instruction])
153 #For now, using lock; addl compatibility mode even for i686, because the
154 #Pentium III is seen as a i686, but lacks mfence instruction.
155 #Only using fence for x86_64.
156 #
157 #k1om is the name for the Intel MIC family (Xeon Phi). It is an x86_64
158 #variant but lacks fence instructions.
159 AS_IF([test "x$host_cpu" != "xi386" -a "x$host_cpu" != "xi486" -a "x$host_cpu" != "xi586" -a "x$host_cpu" != "xi686" -a "x$host_vendor" != "xk1om"],[
160 AC_MSG_RESULT([yes])
161 AC_DEFINE([CONFIG_RCU_HAVE_FENCE], [1])
162 ],[
163 AC_MSG_RESULT([no])
164 ])
165 ])
166
167 # Check if sys_futex() is available
168 AC_MSG_CHECKING([for sys_futex()])
169 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
170 #include <sys/syscall.h>
171 #ifndef __NR_futex
172 #error "futexes not available"
173 #endif
174 ]])
175 ],[
176 AC_MSG_RESULT([yes])
177 AC_DEFINE([CONFIG_RCU_HAVE_FUTEX], [1])
178 compat_futex_test=0
179 ],[
180 AC_MSG_RESULT([no])
181 compat_futex_test=1
182 ])
183
184 # Check for pthread
185 AC_CHECK_LIB([pthread], [pthread_create],
186 [AM_CONDITIONAL(LIBC_INCLUDES_PTHREAD, false)],
187 [AC_CHECK_LIB([c], [pthread_create],
188 [AM_CONDITIONAL(LIBC_INCLUDES_PTHREAD, true)],
189 [AC_MSG_ERROR([Cannot find libpthread. Use [LDFLAGS]=-Ldir to specify its location.])]
190 )]
191 )
192
193 AM_CONDITIONAL([COMPAT_FUTEX], [test "x$compat_futex_test" = "x1"])
194 AM_CONDITIONAL([COMPAT_ARCH], [test "x$SUBARCHTYPE" = "xx86compat"])
195 AM_CONDITIONAL([NO_SHARED], [test "x$enable_shared" = "xno"])
196
197 # smp-support configure option
198 AC_ARG_ENABLE([smp-support],
199 AS_HELP_STRING([--disable-smp-support], [Disable SMP support. Warning: only use this on uniprocessor systems. [default=enabled]]),
200 [def_smp_support=$enableval],
201 [def_smp_support="yes"])
202 AS_IF([test "x$def_smp_support" = "xyes"], [AC_DEFINE([CONFIG_RCU_SMP], [1])])
203
204
205 # From the sched_setaffinity(2)'s man page:
206 # ~~~~
207 # The CPU affinity system calls were introduced in Linux kernel 2.5.8.
208 # The library interfaces were introduced in glibc 2.3. Initially, the
209 # glibc interfaces included a cpusetsize argument. In glibc 2.3.3,
210 # the cpuset size argument was removed, but this argument was
211 # restored in glibc 2.3.4.
212 # ~~~~
213
214 # In addition to that, some vendors ported the system call to 2.4
215 # kernels.
216
217 # Furthermore, when the function first appeared, the MASK argument was
218 # an unsigned long pointer, while later it was made into a cpu_set_t
219 # pointer. Systems that have the cpu_set_t version also should have
220 # the CPU_ZERO, CPU_SET, etc. macros.
221
222 # All this mess means we have to cater for at least 3 different
223 # sched_setaffinity prototypes:
224
225 # ~~~~
226 # int sched_setaffinity (pid_t pid, unsigned int len, unsigned long *mask);
227 # int sched_setaffinity (pid_t __pid, size_t __cpusetsize, const cpu_set_t *__cpuset);
228 # int sched_setaffinity (pid_t __pid, const cpu_set_t *__mask);
229 # ~~~~
230
231 # Since we define _GNU_SOURCE in the sources, must do so too in the
232 # autoconf tests, as defining _GNU_SOURCE or not exposes
233 # sched_setaffinity bits differently.
234 saved_CFLAGS=$CFLAGS
235 CFLAGS="$CFLAGS -D_GNU_SOURCE"
236
237 AC_CHECK_TYPES([cpu_set_t],
238 [have_cpu_set_t="yes"],
239 [have_cpu_set_t="no"],
240 [#include <sched.h>])
241
242 # Confirm that we have CPU_ZERO, and it actually works.
243 AC_MSG_CHECKING([whether CPU_ZERO works])
244 AH_TEMPLATE([HAVE_CPU_ZERO], [Defined to 1 if we have CPU_ZERO and it works])
245 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
246 #define _GNU_SOURCE
247 #include <sched.h>
248 int main()
249 {
250 cpu_set_t foo; CPU_ZERO(&foo);
251 return 0;
252 }
253 ]])
254 ],[
255 AC_DEFINE(HAVE_CPU_ZERO, 1)
256 AC_MSG_RESULT([yes])
257 ],[
258 AC_MSG_RESULT([no])
259 ])
260
261 # Confirm that we have CPU_SET, and it actually works.
262 AC_MSG_CHECKING([whether CPU_SET works])
263 AH_TEMPLATE([HAVE_CPU_SET], [Defined to 1 if we have CPU_SET and it works])
264 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
265 #define _GNU_SOURCE
266 #include <sched.h>
267 int main()
268 {
269 cpu_set_t foo, mask; CPU_SET(0, &foo);
270 return 0;
271 }
272 ]])
273 ],[
274 AC_DEFINE(HAVE_CPU_SET, 1)
275 AC_MSG_RESULT([yes])
276 ],[
277 AC_MSG_RESULT([no])
278 ])
279
280 # First check if the function is available at all.
281 AC_CHECK_FUNCS([sched_setaffinity],[
282 # Okay, we have it. Check if also have cpu_set_t. If we don't,
283 # then we have the first version using unsigned long, and no
284 # CPU_ZERO, etc. macros. If we do have cpu_set_t, we may have the
285 # version with 2 or 3 arguments. In that case, CPU_ZERO, etc.,
286 # should also be present, but we confirm nonetheless.
287
288 AS_IF([test "x$have_cpu_set_t" = "xyes"], [
289 # We do have it.
290 # Check how many arguments does sched_setaffinity take.
291 # Should be 3 or 2.
292 AC_MSG_CHECKING([how many arguments sched_setaffinity takes])
293 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
294 #include <sched.h>
295 int main()
296 {
297 cpu_set_t foo;
298 sched_setaffinity(0, sizeof (foo), &foo);
299 return 0;
300 }
301 ]])
302 ],
303 [sched_set_affinity_args=3],
304 [sched_set_affinity_args=2])
305 AC_DEFINE_UNQUOTED(SCHED_SETAFFINITY_ARGS,
306 $sched_set_affinity_args,
307 [Defined to sched_setaffinity's number of arguments.])
308 AC_MSG_RESULT([$sched_set_affinity_args])
309 ],[
310 # No cpu_set_t, always 3 args.
311 AC_DEFINE(SCHED_SETAFFINITY_ARGS, 3)
312 ])
313 ])
314
315 CFLAGS=$saved_CFLAGS
316
317 AC_CONFIG_LINKS([
318 urcu/arch.h:$ARCHSRC
319 urcu/uatomic.h:$UATOMICSRC
320 ])
321 AC_CONFIG_FILES([
322 Makefile
323 doc/Makefile
324 doc/examples/Makefile
325 tests/Makefile
326 tests/common/Makefile
327 tests/unit/Makefile
328 tests/benchmark/Makefile
329 tests/regression/Makefile
330 tests/utils/Makefile
331 liburcu.pc
332 liburcu-bp.pc
333 liburcu-cds.pc
334 liburcu-qsbr.pc
335 liburcu-mb.pc
336 liburcu-signal.pc
337 ])
338 AC_OUTPUT
339
340 # Report on selected configure options
341 AS_IF([test "x$def_smp_support" = "xyes"],[
342 AS_ECHO("SMP support enabled.")
343 ],[
344 AS_ECHO("SMP support disabled.")
345 ])
346
347 AS_IF([test "x$def_tls_detect" = "x"],[
348 AS_ECHO("Thread Local Storage (TLS): pthread_getspecific().")
349 ],[
350 AS_ECHO("Thread Local Storage (TLS): $def_tls_detect.")
351 ])
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